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mp157 smallest energy efficient off-line regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 1 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. the future of analog ic technology description mp157 is a primary side regulator providing accurate constant voltage (cv) regulation without the opto-coupler. it supports buck, buck-boost, boost and flyback topologies. a 500v mosfet is integrated in the regulator, so very simple structure and low cost can be achieved. these features make mp157 an ideal solution for off-line low power applications. typical applications include home appliance, standby power and industrial control. mp157 is a green mode operation regulator. when the load decreases, the peak current and the switching frequency decrease with the load. as a result, it still offers excellent efficiency performance at light load, thus better average efficiency is achieved. mp157 features various protections like thermal shutdown (tsd), vcc under voltage lockout (uvlo), over load protection (olp), short circuit protection (scp), open loop protection. mp157 is available in the tsot23-5 and soic8 packages. features ? primary side constant voltage (cv) control, supporting buck, buck-boost, boost and flyback topologies ? integrated 500v/10 ? mosfet ? < 100mw no-load power consumption ? up to 6w output power ? maximum discontinuous conduction mode (dcm) output current less than 225ma, maximum continuous conduction mode (ccm) output current less than 360ma ? low vcc operating current ? frequency foldback ? limited maximum frequency ? peak current compression ? internal high voltage current source ? internal 400ns leading edge blanking ? thermal shutdown (auto restart) ? vcc under voltage lockout with hysteresis (uvlo) ? timer based over load protection ? short circuit protection ? open loop protection applications ? home appliances, white goods and consumer electronics ? industrial controls ? standby power all mps parts are lead-free, halogen free, and adhere to the rohs directive. for mps green status, please visit mps website under qualit y assurance. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithic power systems, inc.
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 2 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. typical application
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 3 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. ordering information part number* package top marking mp157gj tsot23-5 see below mp157gs soic-8 see below * for tape & reel, add suffix ?z (e.g. mp157gj?z); * for tape & reel, add suffix ?z (e.g. mp157gs?z); top marking (mp157gj) afc: product code of mp157gj; y: year code; top marking (mp157gs) mp157: product code of mp157gs; mps: mps prefix: y: year code; ww: week code: llllllll: lot number;
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 4 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. package reference top view top view 1 2 3 5 4 source source vcc fb drain vcc fb source source n/c drain n/c n/c 1 2 3 4 8 7 6 5 tsot23-5 soic-8 absolute maximum ratings (1) drain to source .........................-0.3v to 500v all the other pin .............................-0.3v to 6.5v continuous power dissipation (t a = +25c) (2) tsot23-5 ..................................................... 1w soic8 ........................................................... 1w junction temperature ...............................150 ? c lead temperature ....................................260 ? c storage temperature............... -60 ? c to +150 ? c esd capability human body mode .......... 2.0kv esd capability machine mode .................. 200v recommended operating conditions (3) operating junction temp. (t j ). -40c to +125c operating vcc range ...................4.45v to 4.6v thermal resistance (4) ja jc tsot23-5.............................. 100 ..... 55... c/w soic-8.................................... 96 ...... 45... c/w notes: 1) exceeding these ratings may damage the device. 2) the maximum allowable power dissipation is a function of the maximum junction temperature t j (max), the junction-to- ambient thermal resistance ja , and the ambient temperature t a . the maximum allowable continuous power dissipation at any ambient temperature is calculated by p d (max) = (t j (max)-t a )/ ja . exceeding the maximum allowable powe r dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. internal thermal shutdown circuitry protects the device from permanent damage. 3) the device is not guaranteed to function outside of its operating conditions. 4) measured on jesd51-7, 4-layer pcb.
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 5 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. electrical characteristics v cc = 5v, t a = 25 ? c, unless otherwise noted. parameter symbol condition min typ max units start-up current source (drain pin) internal regulator supply current i regulator v cc =4v;v drain =100v 2.5 3.5 4.5 ma leakage current from pin drain i leak v cc =5v;v darin =400v -- 10 25 a break down voltage v (br)dss 500 -- -- v supply voltage management (vcc pin) vcc increasing level at which the internal regulator stops vcc off 4.5 4.6 4.9 v vcc decreasing level at which the internal regulator turns-on vcc on 4.3 4.45 4.7 v vcc regulator on and off hy steresis -- 230 -- mv vcc decreasing level at which the ic stops working vcc stop 3.2 3.35 3.5 v vcc decreasing level at which the protection phase ends vcc pro 2.05 2.35 2.65 v internal ic consumption i cc v cc =4.6v, fs=45khz duty= 40% -- -- 500 a internal ic consumption (no switch) i cc v cc =4.6v -- -- 165 ua internal ic consumption, latch off phase i cclatch v cc =5v -- 16 -- a internal mosfet (drain pin) break down voltage v brdss 500 -- -- v on-state resistance r on -- 10 -- ? internal current sense peak current limit i limit 500 640 780 ma leading edge blanking t leb1 -- 400 -- ns scp point i scp -- 900 1200 ma leading edge blanking for scp (5) t leb2 -- 180 -- ns feedback input (fb pin) minimum off time t minoff 10.6 13.1 15.6 us feedback threshold to turn on the primary mosfet v fb 2.45 2.55 2.65 v feedback threshold to trigger the olp v fb_olp 1.6 1.7 1.8 v over load protection delay time t olp fs=37khz -- 150 -- ms open loop detection v old -- 60 -- mv thermal shutdown thermal shutdown threshold (5) -- 150 -- oc notes: 5) guarantee by characterization
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 6 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. typical characteristics vcc on (v) vcc pro (v) v fb (v) vcc off (v) on-state resistance vs. temperature feedback threshold vs. temperature vcc decreasing level at which the internal regulator turns-on vs. temperature vcc decreasing level at which the protection phase ends vs. temperature vcc increasing level at which the internal regulator stops vs. temperature peak current limit vs. temperature scp point vs. temperature minimum off time vs. temperature i limit (ma) i scp (ma) v bvdss (v) break down voltage vs. temperature -40-25 -10 5 20 35 50 65 80 95 110125 -40-25 -10 5 20 35 50 65 80 95 110125 -40-25 -10 5 20 35 50 65 80 95 110125 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 -40 -25-10 5 20 35 50 65 80 95110 125 -40 -25-10 5 20 35 50 65 80 95110 125 4.42 4.44 4.46 4.48 4.50 4.52 4.54 4.56 4.58 4.60 4.62 2.20 2.15 2.10 2.25 2.30 2.35 2.40 2.45 2.50 2.55 2.60 -40-25-10 5 20 35 50 65 80 95 110125 12.8 12.9 13.0 13.1 13.2 13.3 13.4 13.5 13.6 13.7 13.8 -40-25 -10 5 20 35 50 65 80 95110 125 -40-25 -10 5 20 35 50 65 80 95110125 -40-25-10 5 20 35 50 65 80 95110125 530 540 550 560 570 580 590 600 610 620 630 2.48 2.49 2.50 2.51 2.52 2.53 2.54 2.55 2.56 2.57 2.58 4.66 4.68 4.70 4.72 4.74 4.76 4.78 4.80 4.82 4.84 4.86 580 590 600 610 620 630 640 650 660 670 680 200 300 400 500 600 700 800 900 1000 1100 1200
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 7 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. typical performanc e characteristics v in = 265vac, v out = 12v, i out = 350ma, l = 1.2mh, c out = 100 f, t a = +25c, unless otherwise noted. start up normal operation scp open loop v ds 100v/div. i l 200ma/div. v ds 100v/div. i l 200ma/div. v ds 100v/div. i l 200ma/div. v ds 100v/div. i l 200ma/div.
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 8 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. typical performanc e characteristics v in = 230vac, v out = 12v, i out = 350ma, l = 1.2mh, c out = 100 f, t a = +25c, unless otherwise noted. input power start up input power shut down scp entry scp recovery open loop entry open loop recovery output voltage ripple load transient v ripple 100mv/div. v ripple 50mv/div. i out 200ma/div. v ds 100v/div. i l 200ma/div. v ds 100v/div. i l 200ma/div. v ds 100v/div. i l 200ma/div. v ds 100v/div. i l 200ma/div. v ds 100v/div. i l 200ma/div. v ds 100v/div. i l 200ma/div.
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 9 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. pin functions pin # tsot23-5 pin# soic8 name description 1 1 vcc power supply of all the control circuit. 2 2 fb feedback of the regulator. 3,4 3,4 source source of internal power mosfet. ground reference for vcc and fb pins. 5 7 drain drain of internal power mosf et. input of high voltage current source. 5,6,8 n/c not connected.
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 10 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. functional block diagram drain vcc fb source start up unit power management feedback control driving signal management protection unit peak current limitation figure 1: functional block diagram
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 11 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. operation mp157 is a green mode operation regulator. with the load decreasing, the peak current and the switching frequency will both decreasing with the load. as a result, it still offers excellent efficiency performance at light load, thus better average efficiency is achieved. as shown in the typical application diagram, the regulator is designed to operate with a minimum number of external components. it incorporates the following features as described in the following sections. start-up and under voltage lock-out the internal high voltage regulator self-supplies the ic from the drain pin. the ic starts switching and the internal high voltage regulator turns off as soon as the voltage on pin vcc reaches vcc off (4.6v, typical). the internal high voltage regulator turns on to charge the external vcc capacitor when the vcc voltage decreases below vcc on (4.45v, typical). so a small capacitor such as several uf capacitor is enough to hold on the voltage of vcc and this can lower the cost by decreasing the value of the capacitor. when the voltage on pin vcc drops blow vcc stop (3.3v, typical), the ic stops working, then the internal high voltage regulator charges the vcc capacitor again. when fault conditions happen, such as olp, scp, and otp, the ic stops working and an internal current source, around 16ua, will discharge the vcc capacitor, before the vcc drops below vcc pro (2.4v, typical), the internal high voltage regulator will not start to charge the vcc capacitor again. so when the fault conditions happen, the restart time can be calculated by the following equation, ? ? ?? ?? cc restart vcc vcc v2.4v 4.6v 2.4v tc c 16ua 3.5ma figure 2 shows the typical waveform with vcc under voltage lock out. vcc off =4.6v vcc on =4.45v vcc internal current source driving signal on off vcc stop =3.3v figure 2: vcc under-voltage lock out constant voltage operation mp157 is a fully integrated regulator when used in the buck solution, as shown in the typical application on page2. at the beginning of each cycle, the integrated mosfet is turned on when the feedback voltage is below the reference voltage ? 2.5v, which indicates insufficient output voltage. the on period is determined by the peak current limit. after the on period elapses, the integrated mosfet is turned off. the freewheeling diode (d1) will not be turned on until inductor (l1) charges the voltage of the sampling capacitor (c3) to equal the output voltage. the sampling capacitor voltage changes along with the output voltage. the sampling capacitor can sample and hold the output voltage to keep the output voltage regulated. the voltage of the sampling capacitor will decrease when the current of inductor is smaller than the output current. when the feedback voltage falls below the internal reference voltage ? 2.5v, another switching cycle begins. the detail operation in ccm is shown as figure 3.
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 12 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. mos diode i l i peak i o v o v fb 2.5v figure 3: vfb vs vout thus by monitoring the sampling capacitor, the output voltage can be regulated, and the output voltage is determined by the following equation: r1 r2 vout 2.5v r2 ? ?? frequency foldback at the light load or no load conditions, the output drops very slowly. this makes the mosfet off time increase. the frequency decreases as the load decreases. so mp157 can maintain a high efficiency under light load condition by reducing the switching frequency automatically. the switching frequency can be obtained as: in o o s peak o in (v v ) v f 2l(i i ) v ? ?? ? , for ccm ? ?? in o o o s 2 peak in 2(v v ) i v f li v , for dcm at the same time, the peak current limit starts to decrease from 640ma as the off-time increases. at standby mode, the frequency and the peak current are both minimum, so smaller dummy load could be added. as a result, peak current compression function helps to save no load consumption. the peak current limit can be calculated by the following equation (t off is the off time of the power module): ?????? peak off i 640ma (3ma / s) (t 13.1 s) minimum off time limitation a minimum off time limitation is implemented. during the normal operation, the minimum off time limit is 13.1 ? s, and during the start up period, the minimum off time limit is shorten gradually from 52.4 ? s, 26.2 ? s to 13.1 ? s (shown as figure 4). each minimum off time retains 128 switching cycle. this soft start function provides safe start-up. 128 switching cycle 52.4 us ? 128 switching cycle 26.2 us ? 13.1 us ? driver figure 4: t minoff at start-up ea compensation - + v fb m - + v ref 2.5v ea + + - + fb comparator v ramp v ramp i peak figure 5: ea and ramp compensation to obtain a better load regulation, mp157 features ea (error amplifier) compensation function (shown as figure 5). after 6 ? s delay of mosfet turning off, mp157 samples the feedback voltage. so with the ea compensation, the reference voltage? 2.5v can be regulated with the load. this can make better regulation of power module. ramp compensation to maintain the precise output voltage, an internal ramp compensation circuit is added --- an exponential voltage sinking source will be added to pull down the reference voltage of the
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 13 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. feedback comparator which is also shown in figure 5. the ramp compensation is related with the load conditions. at the full load conditions, the compensation is about the 3mv/ ? s. with the load decreases, the compensation increases exponentially. over load protection (olp) as the load increases, the peak current and the switching frequency both increase. when switching frequency and peak current reaches the maximum, output voltage decreases if the load continues to increase. so fb voltage drops below olp point. by continuously monitoring the fb voltage, when fb voltage drops below 1.7v which is considered as an error flag, the timer starts counting. if the error flag removes, the timer resets. if the timer reaches its completion when it has counted to 150ms (fs=37khz), olp takes place. this timer duration avoids triggering olp function when the power supply is at start up or load transition phase. so power supply should start up in less than 150ms (fs=37khz). different switching frequency (fs) leads to different over load protection delay time, as shown following equation: ?? dealy 37khz t150ms fs short circuit protection (scp) the mp157 monitors the peak current, and shuts down when the peak current rises above 900ma, featuring a short circuit protection. as soon as the fault disappears, the power supply resumes operation. thermal shutdown (tsd) to prevent from any lethal thermal damage, mp157 shuts down switching cycle when the inner temperature exceeds 150 ? c. during the thermal shutdown (tsd), the vcc will be discharged to 2.4v, and then be re-charged by the internal high voltage regulator. open loop detection if the fb voltage is lower than 60mv, ic will stop working and a re-start cycle will begin. during the start up, the open loop detection is blanked for 128 switching cycles. leading edge blanking in order to avoid the premature termination of the switching pulse due to the parasitic capacitance, an internal leading edge blanking (leb) unit is employed between the current sense resistor inside the ic and the current comparator input. during the blanking time, the current comparator is disabled and can not turn off the external mosfet. figure 6 shows the leading edge blanking. t leb = 400 ns v limit t figure 6: leading edge blanking
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 14 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. application information table 1. common topologies using mp157 topology circuit schematic features high-side buck 1. no-isolation, 2. positive output 3. low cost 4. direct feedback high-side buck-boost 1. no-isolation, 2. negative output 3. low cost 4. direct feedback boost 1. no-isolation, 2. positive output 3. low cost 4. direct feedback flyback 1. isolation, 2. positive output 3. low cost 4. indirect feedback
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 15 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. topology options mp157 can be used in common topologies, such as buck, buck-boost, boost and flyback. please find the table.1 for more information. component selection input capacitor the input capacitor is used to supply the dc input voltage for the converter. figure 7 shows the typical dc bus voltage waveform with half- wave rectifier and full-wave rectifier. vin v dc(max) v dc(min) dc input voltage a) dc input with half-wave rectifier vin v dc(max) v dc(min) dc input voltage b) dc input with full-wave rectifier figure 7: input voltage waveform when the half-wave rectifier is used, the input capacitor is usually set as 3uf/w for the universal input condition. and when the full-wave rectifier is used, we could choose a smaller capacitor usually set as 1.5-2uf/w. avoid the minimum dc voltage below 70v. low dc input voltage will bring the problem of thermal shutdown. half-wave rectifier is recommended for <2w output application and full-wave rectifier is recommended for >2w output application. inductor mp157 has a minimum off time limit, and this decides the maximum power it can output. the maximum power increases as the inductor increases. using a smaller inductor may fail output the full load. the maximum power can be obtained as: ominoff omax o peak vt pv(i ) 2l ?? , for ccm ?? ? 2 o max peak minoff 11 pli 2 , for dcm to consider the parameter error of the converter such as peak current limit, minimum off time and so on, we can obtain the minimum value pmin of the maximum power. the principle of choosing the inductor is that pmin should be higher than the rated power. take the output voltage 12v as examples, the curve of pmin for 12v is shown as figure 8, (ipeak=0.64a, tminoff=13.1 ? s) p min (w) inductance(mh) 2.6 3 3.4 3.8 4.2 4.6 5 0.4 0.5 0.6 0.7 0.8 0.9 figure 8: pmin vs. l at 12v output for ccm operation, the selection of l should make the frequency of converter lower than 40khz to reduce the turn-on switching loss cause by reverse recovery of free-wheeling diode at high line input. freewheeling diode the diode should have a maximum reverse voltage rating which is greater than the maximum input voltage, and the current rating of the diode is determined by the output current. the reverse recovery of freewheeling diode can affect the efficiency and the circuit operation. for ccm operation. ultra fast diode with trr<35ns is used such as stth2r06, stth1r06, and ugc10jh. for dcm operation, diode with trr<75ns is used.
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 16 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. output capacitor the output capacitor is required to maintain the dc output voltage. the output voltage ripple can be estimated by: ccm _ ripple esr so i vir 8f c ? ???? , for ccm 2 pk o o dcm _ ripple pk esr so pk ii i vir fc i ?? ? ?? ?? ?? ?? ?? , for dcm ceramic, tantalum or low esr electrolytic capacitors are used to reduce the output voltage ripple. feedback resistors the resistor divider determines the output voltage. choose appropriate values for r1 and r2 to maintain v fb at 2.5v. avoid large r2 value (typically 4k ? to 10k ? ). feedback capacitor the feedback capacitor provides a sample and hold function. small capacitors result in poor regulation at light loads, and large capacitors affect the circuit operation. roughly estimate an optimal capacitor value using the following equation: oo oo fb 12o 12o vc vc 1 c 2r r i r r i ?? ? ? ?? choose the nearest appropriate value. dummy load a dummy load is required to maintain the load regulation. this ensures sufficient inductor energy to charge the sample and hold capacitor to detect the output voltage. normally a 3ma dummy load is needed and can be adjusted to the regulated voltage. increasing the dummy load reduces the efficiency and no-load consumption. use a zener diode if no-load regulation is not a concern. auxiliary v cc supply mp157 vcc fb source source c3 r1 r2 d2 c4 l1 vout r3 d3 figure 9: auxiliary v cc supply circuit if output voltage is higher than the voltage of vcc, an auxiliary vcc supply by connecting a diode (d3) and a resistor (r3) between c3 and c4 can be implemented to reduce overall power consumption. then the voltage of vcc can be clamped to 5v, and the internal regulator will be turned off all the times. for values above v o =7v, determine r3 as per the formula below. ? ? ? o v5v r 165 a surge performance select an appropriate input capacitor value to obtain a good surge performance. with the input capacitors c4 (10 f) and c5 (10 f), the board can pass 1000v surge test. table 2 shows the capacitance required under normal condition for different surge voltage. table 2: recommended capacitance surge voltage 500v 1000v 2000v c4 3.3 f 10 f c5 3.3 f 10 f shown in figure 9 the board can pass 2kv surge test by using the circuit below. 1) change the fuse resistor f1 (10ohm/1w) to ss-5-2a 2) add a mov rv1 (tvr14431) 3) add a resistor r8 (39 ? )
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 17 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. l n 10uf/400v c4 10uf/400v c5 l1 d3 d6 39 r8 d4 d7 33nf cx1 f1 ss-5-2a rv1 tvr14431 figure 10: solution to pass 2kv surge test layout guide pcb layout is very important for reliable operation, good emi and thermal performance. please follow these guidelines to optimize performance. 1) minimize the loop area formed by the input capacitor, ic, freewheeling diode, inductor and output capacitor. 2) place the power inductor far away from the input filter. 3) place a capacitor valued at several nf between the fb pin and source as close to the ic as possible. 4) connect the exposed pad with the drain pin to a larger copper area to improve thermal performance. a) top layer b) bottom layer figure 11: pcb layout design example below is a design example following the application guidelines for the specifications: table 3: design example v in 85vac to 265vac v out 12v i out 350ma the detailed application schematic is shown in figure 12. the typical performance and circuit waveforms have been shown in the typical performance characteristics section. for more device applications, please refer to the related evaluation board datasheets -- ev157-j- 00a_r1.0 or ev157-s-00a_r1.0.
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 18 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. typical application circuits figure 12 shows a typical applicat ion example of a 12v, 350ma non-isolated power supply using mp157. l n 10uf/400v c4 10uf/400v c5 1mh l1 d3 1n4007 d6 1n4007 d5 stth1r06 100uf/25v c6 gnd vout gnd 220nf c1 19.6k r1 4.99k r4 nc r3 drain 5 source 4 vcc 1 fb 2 source 3 u1 mp157 2.2uf c2 10/1w f1 1uf c7 470pf c3 85~265vac 12v/350ma d4 1n4007 d7 1n4007 3k r7 d2 1n4007 1n4148ws d1 24k r2 nc r5 1.2mh l2 33nf cx1 figure 12: typical application at 12v, 350ma
mp157 ?smallest energy efficient off-li ne regulator with extended power range mp157 rev. 1.04 www.monolithicpower.com 19 6/27/2016 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. package information tsot23-5 0.30 0.50 seating plane 0.95 bsc 0.70 0.90 1.00 max 0.00 0.10 top view front view side view recommended land pattern 2.80 3.00 1.50 1.70 2.60 3.00 13 4 5 0.09 0.20 note: 1) all dimensions are in millimeters . 2) package length does not include mold flash , protrusion or gate burr. 3) package width does not include interlead flash or protrusion. 4) lead coplanarity (bottom of leads after forming ) shall be 0.10 millimeters max. 5) drawing conforms to jedec mo-193, variation aa. 6) drawing is not to scale . 0.30 0.50 0 o -8 o 0.25 bsc gauge plane 2.60 typ 1.20 typ 0.95 bsc 0.60 typ see detail "a" detail a
mp157 ?smallest energy efficient off-li ne regulator with extended power range notice: the information in this document is subject to change wi thout notice. please contact m ps for current specifications. users should warrant and guarantee that third party intellectual property rights ar e not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. mp157 rev. 1.04 www.monolithicpower.com 20 6/27/2016 mps proprietary information. patent protec ted.. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. package information soic-8 0.016(0.41) 0.050(1.27) 0 o -8 o detail "a" 0.010(0.25) 0.020(0.50) x 45 o see detail "a" 0.0075(0.19) 0.0098(0.25) 0.150(3.80) 0.157(4.00) pin 1 id 0.050(1.27) bsc 0.013(0.33) 0.020(0.51) seating plane 0.004(0.10) 0.010(0.25) 0.189(4.80) 0.197(5.00) 0.053(1.35) 0.069(1.75) top view front view 0.228(5.80) 0.244(6.20) side view 14 85 recommended land pattern 0.213(5.40) 0.063(1.60) 0.050(1.27) 0.024(0.61) note: 1) control dimension is in inches . dimension in bracket is in millimeters . 2) package length does not include mold flash , protrusions or gate burrs. 3) package width does not include interlead flash or protrusions. 4) lead coplanarity (bottom of leads after forming ) shall be 0.004" inches max. 5) drawing conforms to jedec ms -012, variation aa. 6) drawing is not to scale . 0.010(0.25) bsc gauge plane

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